Explanation:
a⁴+16a²b-2ab-a²+64b²-b²
we can also write them as,
a⁴+16a²b+64b²-a²-2ab-b²
Now, from -a²-2ab-b² if we take - as common term then we get,
a⁴+16a²b+64b²-(a²+2ab+b²)
Now, by using the concept of a²+2ab+b²=(a+b)²
(a²)²+2×a²×8b+(8b)²-{(a)²+2×a×b+(b)²}
(a²+8b)²-(a+b)²
I hope it helped U
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